Door-operating mechanism



Ffeb- 3, 1931. L. o. coRELL. 1,791,475

DOOR OPERATING MECHANISM Filed Aug. 24, 1928 3 Sheets-Sheet l I7 m o Z0 7 ZI 1 1 E zz/ l5 L. O. CORELL Feb. 3, 1931,

DOOR OPERATI NG MECHANI SM Filed Aug. 24, 1928 3 Sheets-Sheet 2 INVENTOR 1,60/2 O. Core!! A TToRNEYS Feb. s, 1931. L. o. CORELL 1,191,475

DOOR OPERATING MEGHANISM med Aug. 24, 1928 s sheets-sheet s yIIHYIH'IH IHH HHH IIIHHHI H/ INVENTOR Leon O, Carell T76- WMM Patented heh.. 3v, lg3d trein ESGE-OPERATING BIECHANISM Application led August 4-, 1928. Seria?. No. 301,338.

rThe main objects of this invention are: First, to provide in a door operating mecha nism an improved control means for the motor by means oi which a reversing motor is automatically adjusted so that on successive actuations ot a push button or control switch, the door is operated in opposite directions.

Second, to provide in a door operating mechanism a brake means by which the l@ momentum of the parts is effectively checked without injury or shock.

lhird, to provide an improved door operating mechanism in which the parts are arranged so that the strain thereon is minimized and theparts are simple and durable.

@bjects relating to details and economies or" my invention will appear from the description to follow. The invention is deiined and pointed out in the claims. Y

A structure whichis a preferred embodiment oi" my invention illustrated in the accompanying drawing, in Which:

Fig. l is a detail plan view of my door operating mechanisn shown in operative relation to a pair of hinged doors.

Fig. 2 is a fragmentary plan view with the mechanism actuated to open the door Fig. 3 is a fragmentary side elevation of the main operating parts.

Fig. Ll is a fragmentary view partially in vertical longitudinal section on a line corresponding to line i of Fiss. 5, S and Fig. 5 is al detail view 'partially in horizontal section online oi Fig. 6.

Fig. 6 is a detail view partially in transverse section on line 6 6 of Figs. 8, and

F ig. 'l' is a fragmentary section corresponding to that of 5 with the running switch open.

8 is a diagrammatic view showing the relation oi the running and starting switches to t ie motor,

ln the drawings similar reference charcters refer to similar parts throughout tic 45 several views.

Referring to the drawings, l, l represent the doors to be controlled which are hinged at 2. yfthe mechanisi. nioWted on elevated supports 3 disposed in par relation to the doors when closed. When the mechanism is used *for operating slicing'door the mechanism is disposed in parallel relation thereto and the connections modiiied accordingly.

l channeled slideway i for the rack 5 whicn is the actuated element of the mechanism is mounted on the supports 3. This slideway aise constitutes a support for the hed memher or bracket 6 on which the motor 'i' is mounted. 'l' his motor is a reversible motor, the reversing element being indicated at S-see il.

if; pin 9 projects from this reversing element through a slot l0 in the motor housing, a spring ll coasting with the pin for yieldingly holding the reversing element at the ends of its stroke. f

rihe shaft l2 et the motor is provided with a pinion 13 meshing with a gear le on the driven shaft l5 rhis shaft l5 is provided with a pinion i6 meshing with the rack. rlhe gear le is connected to the shai'ft by means ot' a riction driving connection consisting of the disc l'l' splined to the shaft and having a friction face 18 coacting with the side of the hub l) of the gear, a thumb screw 20 being provided to regulate the Criving` friction.

On the shaft l5 I mount a brake drum 21. rlhe coacting brake shoes 22 are mounted on opposite sides of the shaft l5. These brake shoes are of segmental shape and are pivotally mounted at 23 on the arms 24 which are supported in the brackets 25 for reciprocating and tilting movement. The released position of the brake shoes is shown by full lines in Fig. 3 in which. position the upper portions of the brake shoes rest on the drum. The actuated position orn one of the brake shoes is indicated by dotted lines in Fig. 8. Thrust springs 26 are mounted on the arms with one end in engagement with the bracket and the other end engaging pins 27 on the arms. rlhese springs are placed under coinpression when the brake shoes are in actuated position and yieldingly support them against the drum.

rl`he bralre shoes are held in released or in inoperative position by means of the sliding detente 28 which are arranged in suitable ways disposed transversely of the rack, the detente being provided with beveled or cammed ends 29 aeapted to be engaged by the rack for forcing the detents to arm engaging position so that the rack acts to hold both detents in brake releasing position until the travel of the racl; is such as to release one of the detente, allowing its releasing spring 30 t0 disengage the same.

The brake shoe being in lrictional contact with the drum, the friction ot the drum on the bralre shoe will carry the brake shoe downwardly and owing to the pressnre oit the spring 2G thereon, the brake is actuated into clutching engagement with the drum. However, on rotation of the drum in the opposite direction, the bralie is automatically returned to relea l p tion and as soon as the rack begins trav el, the detent is actuated to hold the brake in released position. T he travel of the rack lto the opposite en of its strolte will release the bralre, allowing it to act as described.

The reversing member of the motor is automatically reversed on each stroke of the rack by means of the tappet 3l carried by the rack and coacting with the pin 9 on the reversing member. This 'tappet is pivoted at 32 and is held yieldingly in central upright position by means of the springs 33 which are of sulcient strength to overcome the springs 1l and shift the reversing member, however allowing the tappet to pass under the pin when the end of the slot 10 is reached so that the tappet is in position to engage the opposite side of the pin and shift it in the opposite direction on the movement of the rack in the opposite direction.

The rack also controls the running switch designated generally by the numeral 34 and consisting of a pair of electrically connected contacts 35 and a pair of switch members 36 connected in the circuit 87 by the lead wires 38. These switches 36 are supported by spring arms 89 adapted to automatically open the switch members when the arms are released. These arms are provided with tap pets Lil() projecting through openings 41 in the bottoni of the slideway to be engaged by the rack and held in closed position thereby until the rack reaches the end of its travel when one of the switch members 39 is released thereby opening the running switch and stopping the motor. This occurs at approximately the same time as the releasing of one of the brake detents.

The control or starting switch 42 (see diagram Fig. 8) is also connected in the circuit 3T as by means of the lead wires 43. The closing of this switch 4t2 starts the motor and it should be held closed until the movement of the rack has closed the ruiming switch. The starting or control switch may then be released. The running switch is held closed by the rack until it reaches the end of its travel in the particular direction it may be moving.

The reversing tappet is positioned so that the reversing member is actuated during the travel o1 the raclr or before the opening of the runnine` switch so that on succeeding actuations or the starting switch the rotor will travel in opposite directions.

By this arrangement of parts, the brakes act to checl; the momentum of the parts without undue stress or shock thereto and the mech nism is simple and durable. rlhe control is also simple and durable.

l have illustrated and described my improvements in an embodiment which l have found Very practical. l have not attempted to illustrate other modifications and adaptations as it believed this disclosure will enabie those skilled in the art to embody or adapt my improvements as may be desired.

laving thus described my invention, what l claim as new and desire to secure by Letters Patent, is

l. ln apparatus ot the class described, the combination with a motor, of a driven rack, driving connections for said rack to said motor provided with a brake drum, oppo sitely disposed brake shoe arms mounted on opposite sides of the axis of said drum for reciprocating and swinging movement, brake shoes pivot-ally mounted on: said arms so that their upper portions rest on said drum when in released position, thrust springs for said brake shoes, detents coacting with said brake shoe arms tor holding said brake shoes in released position, springs acting to urge said detents to releasing position and projectthem into the path ot said rack, said rack acting to move said detente to and retain them in actuated position, a ruiming switch for said motor controlled by said rack, and a starting switch for said motor.

2. ln an apparatus oit the class described, the combination with a motor, oli a driven ack, driving connections for said rack to sad motor provided with a brake drum, 0ppositely disposed brake shoe arms mounted on opposite sides of the axis of said drum for reciprocating and swinging movement, brake shoes pivotally mounted on said arms so that their upper portions rest on said drum when in released position, thrust springs for said brale slices, detents coacting with said brake shoe arms for holding said brake shoes in released position, and springs acting to urge said detente to releasing position and project them into the path oiA said rack, said rack acting to move said detents to and retain them in actuated position.

3. In an apparatus of the class describef, the combination vith a motor, of a reciproeating driven element, driving connections for said motor to said driven element provide.r with a brake drum, brake shoe arms mounted on opposite sides of the axis of said brake drum for reciprocating and swinging movement, brake shoes mounted on said arms Cin so that their upper ends rest on said drum when in released position, thrust springs for said brake shoes, and spring released detents coacting with said brake shoe arms and operatively associated with said driven element which acts to shift said detents to and retain them in actuated position.

4e. ln an apparatus of the class described, Ithe combination of a motor, a driven element, driving connections for said motor to said driven element provided with a brake mechanism comprising a brake drum, brake shoes mounted on opposite sides of the axis of said brake drum for pivotal7 swinging and reciprocating movement, thrust springs acting to yieldingly urge said brake shoes into engagement with said drum, spring released detents adapted to hold said brake shoes in released position with portions thereof in contact with said drum, said detents being controlled by and held in actuated position by said driven element, a running switch for said motor controlled by said driven element, and a starting switch for said motor.

5. In an apparatus of the class described, the combination of a motor, a driven element, driving connections for said motor to said driven element provided with a brake mechanism comprising a brake drum, brake slices mounted on opposite sides of the aXis of said brake drum for pivotal, swinging and reciprocating movement, thrust springs acting to yieldingly urge said brake shoes into engagement with said drum, and spring released detents adapted to hold said brake shoes in released position with portions thereof in contact with said drum, said detents being controlled by and held in actuated position by said driven element.

6. In an apparatus of the class described, the combination of a motor, a driven element, driving connections for said motor to said driven element provided with a brake including a brake drum, brake shoes mounted on opposite sides of the axis of said brake drum, detents adapted to hold saidbrake shoes in released position withportons thereof in Contact with said drum, said detents being controlled by and held in actuated position by said driven element, a running switch for said motor controlled by said driven element, and a starting switch for said motor.

7.' In an apparatus of the class described, the combination of a motor, a driven element, driving connections for said motor to said driven element provided with a brake including a brake drum, brake shoes mounted on opposite sides of the axis of said brake drum, and detents adapted to hold said brake shoes in released position with portions thereof in contact with said drum, said detents being controlled by and held in actuated position by said driven element.

8. ln an apparatus of the class described, the combination with a motor, of a driven hand.

LEON O. CORELL. 

